156B Week 3

Overview of Status of Analysis, Design, Fabrication, Tests, etc.

• • Fabrication in progress.

  • Acrylic cut, waiting to machine rods.

  • Waiting on remaining parts for fabric shell and webbing.

Accomplishments from Previous Week

• • Cut acrylic end pieces.

  • Machined a test pole to review dimensions with sponsor.

  • Designed a new fabric structure 

  • Received all parts necessary to build.

  • Have bed companies willing to loan us a bed. UPDATE (4/18): Loaner bed promise fell through, continuing search elsewhere. 

Goals for Next Week (list names after each item). Use specific and measurable objectives.

• • Sew fabric shell and internal straps (Scott)

  • Machine poles (Tim/Heja)

  • 3D print a fan adapter (Cameron)

Sponsor Comments from Last Meeting and Actions Taken to Address these Comments (indicate date of comments and if via email or in person)

• • Bike seat that holds patient in place comfortably should be under consideration. 

  • Only the patient's head is inside the MRI, device does not need sized for MRI.

  • Sponsor may acquire hospital bed. 

Instructor Comments from Last Meeting and Actions Taken to Address these Comments  (indicate date of comments and if via email or in person)

• • Concern over number of tie downs stating 4 is not enough. Because the beds being designed for only have four tie downs we will be trying out various ideas for creating even displacement of fabric shell. 

  • Consider using a dry bag style on seams. 

  • Using a ziploc style seal instead of a zipper. We like this idea a lot, parts take 3-5 months to arrive. This will be brought up with sponsor as a solution for future designs. 

Comments from Other Students in the Class (indicate date of comments and if via email or in person)

• • Comment about using wood instead of nylon rods. This is in consideration for the next version because wood is stiffer, however we already have the nylon and nylon is more hygienic. 

  • Comment about sanitizing the nylon mesh straps.

  • Silver nitrate coating to sanitize. 

Risks and Areas of Concern

• • Deformation of lower portion of LBNP

  • Shattering acrylic 

  • Air leakage

Resources or Information Required but not Available

• • Machine shop hours.

Schedule

• • Finish sewing (4/28)

  • Machine poles (4/20)

  • Update Gantt chart.

Budget (list amount spent and amount remaining)

• • Spent: $807.87

  • Remaining: $4,692.13

Progress on Report and Webpage

• • See "Report Drafts" on "Docs" page